Yieldable support for bobbin tips



' Dec.

C. P. BERGSTROM YIELDABLE SUPPORT FOR BOBBIN TIPS Filed Nbv. v 22, 1928 Car/ 1. Bgqxmh Patented Dec.; 30, 1930 UNITED STATES;

PATENT OFFICE CARL P. IBERGSTROM,' OF MILLBURY, MASSACHUSETTS, ASSIGNOR TO CROMPTON &

KNOWLES LOOM WORKS, OF WORCESTER, MASSACHUSETTS, A CORPORATION OF MAS-- SAOHUSETTS YIELDABLESUPPOBT FOB BOBBIN TIPS Application filed. November 22, 1928. Serial No. 321,205;

This invention relates .to improvements in supports for bobbin tips in automatic weft replenishing looms more .particularly'though not necessarily of the multicolor type, and it is a general object of'the invention to provide asubstantial form of bobbin support which will yield not only to permit discharge of the bobbin from the magazine but also toavoid' to the lay so that should a bobbin be misplaced during the forward movement of the lay it might strike the front giveway or support in a direction substantially coincident with the axis of the spring of which the support is formed. Under these conditions either the bobbin is broken or the setting of the support is altered. It is an important objectof my present invention to dispose the bobbin support at an angle other than a right angle with respect to the lay so that the above de scribed breakage cannot occur.

In some instances the bobbin when moving down from one or another of the reserve stacks toward transfer position will have an objectionable endwise movement outwardly with respect to the lay so that at transfer it does not .pass into the shuttle as it should. This endwise motion is normally restrained by the outer plate of the magazine. It is a further object of my present invention to prevent this outward movement by disposing the bobbin support so thatthe latter will act independently of the outer plate on the magazine frame to require the bobbin to move toward transfer position correctly. This re:

sult is achieved by having the bobbin sup-.

port oblique with respect-to the advance movement of the lay and disposed so that the end of the front bobbin, for instance, will extend downwardly and outwardly with respect .to-thelay,

Reserve bobbins as they are ordinarily supplied to weft replenishing mechanisms have a mass of yarn which is of conical formnear the small woodenend of thebobbin. This conical end of course gets smaller toward the end of the bobbin and with the bobbin support mounted as stated the cone on the bobbin co-acts with the obliquity of the support to keep the bobbin in proper position with re-iv spect to the magazine as it. passes toward transfer position.

It will thus be seen that the two-fold effect of providing a coil" spring bobbin support which is yieldable under forward pressure of the lay and capable of'preventingendwise movement of the bobbin as the latter moves toward transfer position may be attained by disposing the support as specified.

WVith these andother objects in view which will appear as the description proceeds, my inventionresides in'the combination and arrangement of parts hereinafter described and Fig.

3 is a detailed horizontal section look ing downwardly on-the line 33 of Fig. 2,.

Fig. lrepresents in a front elevation the position of the conical part of the bobbinas 1 the latter moves from a stack in the magazine towardtransfer position, and

Fig. 5 is a diagrammatic view showing the actionof the forward support when engaged by a misplaced bobbin.

The magazine to which my invention more readily lendsitself comprises an inner plate 10 and'an outer plate 11. The inner plate is provided with a plurality of vertical slots 12 I while the outer plate as shown in Figs. 2 and B5.

3 is formed with corresponding vertical. slots 13. Each slot 12 togetherwith its corresponding-slot 13 forms avertical compartment or gnideway down which reserve bobbins B may move. Control devices arenormally located at the bottom of each compartment, one being shown in front elevation at 14- in Fig. l. The usual tie rods 15 are used to connect the outer plate to the inner plate.

On the forward lower tie rod there is lo cated a holder 20 which is held in adjusted angular and longitudinal position with re spect to the corresponding tie rod by a screw 21. The forward holder has an outwardly projecting arm 22 through which extends an obliquely disposed hole 23. A forward bobbin support 24; extends through the hole and is held in adjusted longitudinal position by a screw 25. The axis of the hole 23 and therefore of the forward support 24: extends downwardly and outwardly with respect to the center of the magazine. Therear holder 26 is similar in its mounting and adjustment to the front holder and in like manner supports a rear bobbin giveway 27 which also is disposed downwardly, outwardly and forwardly.-

As shown in Fig. 3 the tips of the bobbin supports lie opposite each other, but this is not a necessary relation inasmuch as the holders are movable along their respective tie rods so that if desired the rear holder may be located nearer the inside plate 10 to occupy the relative position with respect to the forward tip support which is illustrated in patent to Chevrette' No. 1,560,736.

The particular form of support set forth herein is substantially the same as that shown in the aforesaid application filed by King and comprises a single piece of wire coiled on itself, the coils being closed and the coils at one end being tapered as suggested at 28. The particular form of the support 24 need not necessarily be that shown herein, as sup ports of the type shown in patents to Chevrette Nos. 1,608,647 and 1,612,097, or patent to Chevrette and Erler No. 1,608,650 may be employed.

An important relation between the oblique support and the conical portion C of a bobbin B as the latter passes toward transfer position is illustrated in Fig. 4. From this figure it will be seen that due to the angular position of the bobbin support it will engage progressively diminishing diameters of the conical portion C of the wound mass of weft W on the bobbin as the latter rolls toward transfer position. This is due to the fact that the support extends outwardly as well as downwardly. If desired, the supports may be arranged to engage the wooden tip end of the bobbin as suggested in Fig. 2 when the bobbins are in transfer position. The effect of the movement of the conical part of the wound mass along the support 24 is to prevent the bobbin from moving unduly to the right as viewed in Fig. l, thus requiring the butt end of the bobbin to have its proper relation with respect to the inner plate 10 and therefore with the transferrer mechanism and shuttle not shown.

As shown in Fig. 5 the support 24; may bend so that the lower end of its axis will be deflected forwardly by a misplaced bobbin B. This deflection is highly desirable and in the case of the support shown in the aforesaid King application cannot readily take place because of the fact that the coils of the spring are necessarily close wound to prevent the weft end from the bobbins from becoming entangled between adjacentconvolutions of the spring.

From the foregoing it will be seen that I have provided a. very simple and inexpensive form of bobbin support and have provided means for disposing the same at such angles with respect to the forces which may be brought to bear upon it that said support can deflect to prevent breakage either of itself or the bobbin. It will also be seen that by disposing the supports so that they ")oint outwardly a cooperation is brought a out with the conical part of the bobbin which will prevent the latter from having undue endwise movement. The action described in connection with the forward support may also occur with the rear support, should a mi placed bobbin be carriet rearwardly by the lay along a path intersecting the rear support.

Having thus described my invention it will be seen that changes and modifications may be made therein by those skilled in the art without departing from tie spirit and scope of the invention and I do not wish to be limited to the details herein disclosed, but what I claim is:

1. In a weft replenishing loom having a magazine, a lay, a sul'istantially cylindrical bobbin support capable of bending on it... and means on the magazine having a support engaging portion to hold said support so that the'sa'me projects downwardly and obliquely with respect to the movement of the lay.

2. In aweft replenishing loom having a magazine frame and a lay, an elongated substantially cylindrical bobbin support mounted on the frame and yieldable on itself, the normal axis of the support being disposed obliquely with respect to the forward movement of the lay and outwardly with respect to the magazine frame.

3. In a weft replenishing loom having a magazine frame and a lay, a substantial y cylindrical bobbin support ca, able of bending on itself in all directions with respect to its normal axis, and means on the magazine having a support engaging portion to hold said support so tl at the normal :1. -sthereof is inclined downwardly and outwardly with respect to the magazine frame, said support positioned to engage the con til mass of yarn on the bobbin and tend to move the latter toward the frame.

4. In a weft replenishing loom having a magazine frame and a lay, a substantially cylindrical bobbin support capable of bending on itself in all directions with respect to its normal axis, and a mounting on the magazine frame for the support to hold the latter so that the normal axis of the same will normally extend downwardly and obliquely 1with respect to the forward movement of the 5. In a weft replenishing loom having a magazine frame and a lay, a substantially cylindricalbobbin support capable-of bend ing on itself in all directions with respect to its normal axis, and a mounting on the mag azine frame for the support to hold the latter so that the normal axis of the same will normally extend downwardly and obliquely with respect to the forward movement of the lay and outwardly with respect to the magazine frame.

6. In a weft replenishing loom having a magazine frame and a lay, a substantially cylindrical bobbin support capable of band ing on itself in all directions with respect to its normal axis, a tie rod forming part of the magazine frame, a holder mounted on the tie rod for longitudinal adjustment therealong, and connections between theholder and support to dispose the latter downwardly and also obliquely with respect to the forward movement of the lay.

7 In a weft replenishing loom having a magazine frame and a lay, a bobbin support formed of a wire coiled on itself with the coils closely adj acent. each other, said support being substantially cylindrical in form, and a holder to mount said support so that the axis thereof is inclined downwardly and obliquely with respect to the forward movement of the lay, said bobbin support and holder being supported by the magazine frame. 7

8. In a weft replenishing'loom having a magazine frame and a lay, a bobbin support formed of a wire coiled on itself with the coils closely adjacent each other, and a holder to mount said support so that the axis thereof is inclined downwardly and obliquely with respect to the forward movement of the lay and outwardly with respect to the magazine frame.

9. In a weft replenishing mechanism to operate with a reserve stack of bobbins each having a wound mass of yarn with a conical portion, a substantially cylindrical bobbin support capable of being bent on itself so that the axis thereof maybedefiected in all directions from the normal axis thereof, and means to mount the support so that the same will be inclined downwardly and disposed obliquely in an outward direction with respect to thereplenishing mechanism and positioned to engage the conical portion of a wound mass of yarn on abobbin moving toward transfer position, and tending to prevent? improper endwise} movement of ,the

M. .1. I. L I 10. In .a;;weftreplenishing mechanism to operateiwith areservestack of bobbins each.

having a wound mass of yarnwitha conical portion,.;a substantially cylindrical bobbin supportcapable of being bent :on itself so that'the axis thereof may bedefiected in all directions from the normal axis thereof, a tie rod formingpartof the frame, a holderv mounted onthe tie rod and adjustable longi-' tudin ally with respect thereto, and a connection between the 'holderand thesuppiort to mount the latter with thenormal axis thereof inclined downwardly and" obliquely upwardly with respect to the path of movement of the lay, said holder being positioned to cause cooperation of the conical portion of the-bobbin and the support :as the bobbin moves toward transfer position, and tending to prevent improper endwise movement of the bobbin.

11. In a weft replenishing mechanism to operate with a reserve stack of bobbins each having a wound mass of yarn with a conical portion, a substantially cylindrical bobbin support capable of being bent on itself so ment of the lay, said holder being positioned to cause cooperation of the conical portion I of a bobbin. and the support'as the bobbin moves toward transfer position.

12. In a weft replenishing mechanism to I operate with'a reserve stack of bobbins each having a wound mass of yarn w1th a conical portion, a substantially cylindrical bobbin support capable of being bent on itself so that the axis thereof may be deflected in all directions from the normal axis thereof, and means to mount the support so that the same will be inclined downwardly and disposed obliquely in an outward direction with respect to the replenishing mechanism and positioned to engage the conical portion of a wound mass of yarn on a bobbin moving toward transfer position, and tending to prevent improper endwise movement of the bobbin, said tie rod being substantially'parallel to the axis ofthe bobbin.

13. In a weft replenishing loom having a lay movable back and forth, a magazine frame to hold reserve bobbins,and a bobbin support on the under side of the magazine frame and supported from the latter, said support being capable of bending on itself in a direction substantially parallel to the direction of movement of the lay, and being disposed downwardly and obliquely with'respect to the movement of the lay.

'14 In a weft replenishing loom having a lay movable back and forth, a magazine frame to hold reserve bobbins, and a bobbin support on the under side of the magazine frame and having a part fixed to the latter,

said support being capable of bending on itself in a direction substantially parallel to the'direction of movement of the lay, and

being disposed downwardly and obliquely with respect to the movement of the lay.

In testimony whereof I have hereunto aflixed my signature.

CARL P. BERGSTROM. 

